FIG. 5.

FEM models of cumulative tissue heating resulting from transmitting the sequence shown in figure 4 twenty-four times over a 4 min period. (a) and (b) show results in normally-perfused hepatic tissue. (a) shows the axial-lateral plane, centered in elevation and (b) shows the axial-elevation plane, centered in azimuth. (c) and (d) show similar images to (a) and (b), respectively, but neglect the effects of tissue perfusion. (e) shows the magnitude of peak tissue heating after every image frame is acquired for both the perfused and non-perfused cases.